<template>
	<view class="preview">
		<swiper circular @change="swiperChange" :current="currentIndex">
			<swiper-item v-for="(item,idx) in classList">
				<image v-if="readImgs.includes(idx)" @click="maskChange" :src="item.picurl" mode="aspectFill"></image>
			</swiper-item>

		</swiper>

		<view class="mask" v-show="maskState">
			<view class="goBack" @click="goBack" :style="{top:getStatusBarHeight()+'px'}">
				<uni-icons type="back" color="#fff" size="20"></uni-icons>
			</view>
			<view class="count">{{currentIndex+1}} / {{classList.length}}</view>
			<view class="time">22:31</view>
			<view class="date">07月12日</view>
			<view class="footer">
				<view class="box" @click="showInfo">
					<uni-icons type="info" size=28></uni-icons>
					<text class="text">信息</text>
				</view>
				<view class="box" @click="openRate">
					<uni-icons type="star" size="28"></uni-icons>
					<text class="text">{{currentInfo?.score}}分</text>
				</view>
				<view class="box">
					<uni-icons type="download" @click="clickDownload" size=28></uni-icons>
					<text class="text">下载</text>
				</view>
			</view>
		</view>

		<uni-popup ref="popup" type="bottom">
			<view class="info">
				<view class="header">
					<view class=""></view>
					<view class="title">壁纸信息</view>
					<view class="close" @click="closeInfo">
						<uni-icons type="closeempty" size="18" color="#999"></uni-icons>
					</view>
				</view>

				<scroll-view :scroll-y="true">
					<view class="row">
						<view class="label">壁纸ID：</view>
						<text selectable class="value">{{currentInfo?._id}}</text>
					</view>
					<view class="row">
						<view class="label">发布者：</view>
						<text class="value">{{currentInfo?.nickname}}</text>
					</view>

					<view class="row">
						<text class="label">评分：</text>
						<view class='value roteBox'>
							<uni-rate readonly touchable :value="currentInfo.score" size="16" />
							<text class="score">{{currentInfo?.score}}分</text>
						</view>
					</view>

					<view class="row">
						<text class="label">摘要：</text>
						<view class='value'>
							{{currentInfo.description}}
						</view>
					</view>

					<view class="row">
						<text class="label">标签：</text>
						<view class='value tabs'>
							<view class="tab" v-for="tab in currentInfo.tabs" :key="tab">
								{{tab}}
							</view>
						</view>
					</view>

					<view class="copyright">
						声明：本图片来用户投稿，非商业使用，用于免费学习交流，如侵犯了您的权益，您可以拷贝壁纸ID举报至平台，邮箱513894357@qq.com，管理将删除侵权壁纸，维护您的权益。
					</view>
				</scroll-view>
			</view>

		</uni-popup>

		<uni-popup ref="ratePopup" :is-mask-click="false">
			<view class="ratePopup">
				<view class="header">
					<view class=""></view>
					<view class="title">{{isScore?'评分过了~':'壁纸评分'}}</view>
					<view class="close" @click="closeRate">
						<uni-icons type="closeempty" size="18" color="#999"></uni-icons>
					</view>
				</view>

				<view class="content">
					<uni-rate v-model="userRate" allowHalf :disabled="isScore" disabled-color="#FFCA3E" />
					<text class="text">{{userRate}}分</text>
				</view>

				<view class="footer">
					<button :disabled="!userRate || isScore" size="mini" plain @click="confirmRate">确认评分</button>
				</view>
			</view>
		</uni-popup>
	</view>
</template>

<script setup>
	import {
		getStatusBarHeight
	} from '@/utils/system.js';

	import {
		ref
	} from 'vue';
	import {
		onLoad,
		onShareAppMessage,
		onShareTimeline
	} from '@dcloudio/uni-app';

	import {
		apiGetSetupScore,
		apiWriteDownload,
		apiDetailWall
	} from "@/api/api.js"
	const maskState = ref(true);
	const maskChange = () => {
		console.log("change");
		maskState.value = !maskState.value;
	}


	const popup = ref();
	const showInfo = () => {
		popup.value.open();
	}
	const closeInfo = () => {
		popup.value.close();
	}


	const ratePopup = ref();
	const userRate = ref(0);
	const isScore = ref(false); // 是否评过分
	const openRate = () => {
		// 判断是否评过分
		// 如果评过那么就不让评分
		console.log(currentInfo.value);
		if (currentInfo.value.userScore) {
			isScore.value = true;
			userRate.value = currentInfo.value.userScore;
		}
		ratePopup.value.open();
	}
	const closeRate = () => {
		ratePopup.value.close();
		userRate.value = 0;
		isScore.value = false;
	}
	const confirmRate = async () => {
		uni.showLoading({
			title: "加载中..."
		})
		let {
			classid,
			_id: wallId
		} = currentInfo.value;
		let res = await apiGetSetupScore({
			classid,
			wallId,
			userScore: userRate.value
		});
		uni.hideLoading();
		if (res.errCode === 0) {
			uni.showToast({
				title: "评分成功",
				icon: "none"
			})
			// 给缓存中的添加“评分”属性
			classList.value[currentIndex.value].userScore = userRate.value;
			uni.setStorageSync("storeClassList", classList.value);
			closeRate();
		}
	}


	const goBack = () => {
		uni.navigateBack({
			success: () => {

			},
			fail: (err) => {
				uni.reLaunch({
					url: "/pages/index/index"
				})
			}
		})
	}

	const classList = ref([]);
	const storgClassList = uni.getStorageSync("storeClassList") || [];
	// classList：已经浏览过的图片
	classList.value = storgClassList.map(item => {
		return {
			...item,
			picurl: item.smallPicurl.replace("_small.webp", ".jpg")
		}
	})


	const currentId = ref(null);
	const currentIndex = ref(0);
	const currentInfo = ref(null); // 当前图片的信息 
	const readImgs = ref([]); // 已经加载过的图片下标
	// 加载当前图片（currentIndex）的前后共3张图
	function readImgsFun() {
		readImgs.value.push(
			currentIndex.value <= 0 ? classList.value.length - 1 : currentIndex.value - 1,
			currentIndex.value,
			currentIndex.value >= classList.value.length - 1 ? 0 : currentIndex.value + 1
		)
		readImgs.value = [...new Set(readImgs.value)];
	}
	const swiperChange = (e) => {
		currentIndex.value = e.detail.current;
		currentInfo.value = classList.value[currentIndex.value];
		readImgsFun();
	}

	onLoad(async (e) => {
		currentId.value = e.id;
		if (e.type == 'share') {
			// res：返回的是数组但是只有被分享的那一张图片
			let res = await apiDetailWall({
				id: currentId.value
			});
			// 加入到classList中
			classList.value = res.data.map(item => {
				return {
					...item,
					picurl: item.smallPicurl.replace("_small.webp", ".jpg")
				}
			});
		}
		currentIndex.value = classList.value.findIndex(item => item._id == currentId.value)
		currentInfo.value = classList.value[currentIndex.value]
		readImgsFun();
	});


	//点击下载
	const clickDownload = async () => {
		// #ifdef H5
		uni.showModal({
			content: "请长按保存壁纸",
			showCancel: false
		})
		// #endif

		// #ifndef H5
		try {

			uni.showLoading({
				title: "下载中...",
				mask: true
			})
			let {
				classid,
				_id: wallId
			} = currentInfo.value;
			let res = await apiWriteDownload({
				classid,
				wallId
			})
			if (res.errCode != 0) throw res;
			uni.getImageInfo({
				src: currentInfo.value.picurl,
				success: (res) => {
					uni.saveImageToPhotosAlbum({
						filePath: res.path,
						success: (res) => {
							uni.showToast({
								title: "保存成功，请到相册查看",
								icon: "none"
							})
						},
						fail: err => {
							// 授权了，但是由于某种原因没能保存下来
							if (err.errMsg == 'saveImageToPhotosAlbum:fail cancel') {
								uni.showToast({
									title: '保存失败，请重新点击下载',
									icon: "none"
								})
								return;
							}
							// 进行授权
							uni.showModal({
								title: "授权提示",
								content: "需要授权保存相册",
								success: res => {
									if (res.confirm) {
										// 打开权限中心。让用户勾选
										uni.openSetting({
											success: (setting) => {
												console.log(
													setting);
												if (setting
													.authSetting[
														'scope.writePhotosAlbum'
													]) {
													uni.showToast({
														title: "获取授权成功",
														icon: "none"
													})
												} else {
													uni.showToast({
														title: "获取权限失败",
														icon: "none"
													})
												}
											}
										})
									}
								}
							})
						},
						complete: () => {
							uni.hideLoading();
						}
					})

				}
			})

		} catch (err) {
			console.log(err);
			uni.hideLoading();
		}
		// #endif
	}


	//分享给好友
	onShareAppMessage((e) => {
		return {
			title: "咸虾米壁纸",
			path: "/pages/preview/preview?id=" + currentId.value + "&type=share"
		}
	})


	//分享朋友圈
	onShareTimeline(() => {
		return {
			title: "咸虾米壁纸",
			query: "id=" + currentId.value + "&type=share"
		}
	})
</script>
<style lang="scss" scoped>
	.preview {
		height: 100vh;
		width: 100%;
		position: relative;

		swiper {
			height: 100%;
			width: 100%;

			image {
				height: 100%;
				width: 100%;
			}
		}

		.mask {
			&>view {
				position: absolute;
				left: 0;
				right: 0;
				margin: auto;
				width: fit-content;
				color: #fff;
			}

			.goBack {
				width: 38px;
				height: 38px;
				background: rgba(0, 0, 0, 0.5);
				left: 30rpx;
				margin-left: 0;
				border-radius: 100px;
				top: 0;
				backdrop-filter: blur(10rpx);
				border: 1rpx solid rgba(255, 255, 255, 0.3);
				display: flex;
				align-items: center;
				justify-content: center;
			}

			.count {
				top: 10vh;
				border-radius: 40rpx;
				background-color: rgba(0, 0, 0, 0.3);
				padding: 9rpx 28rpx;
				font-size: 28rpx;
			}

			.time {
				font-size: 140rpx;
				top: calc(10vh + 80rpx);
				text-shadow: 0 4rpx rgba(0, 0, 0, 0.3);
			}

			.date {
				font-size: 34rpx;
				top: calc(10vh + 230rpx);
				text-shadow: 0 4rpx rgba(0, 0, 0, 0.3);
			}

			.footer {
				background-color: rgba(255, 255, 255, 0.8);
				bottom: 10vh;
				width: 64vw;
				height: 120rpx;
				border-radius: 120rpx;
				color: #000;
				display: flex;
				justify-content: space-around;
				align-items: center;

				box-shadow: 0 2rpx 0 rgba(0, 0, 0, 0.3);

				.box {
					display: flex;
					justify-content: center;
					align-items: center;
					flex-direction: column;

					.text {
						font-size: 26rpx;
						color: #text-font-color-2;
					}
				}
			}
		}

		.header {
			display: flex;
			justify-content: space-between;
			align-items: center;

			.title {
				color: $text-font-color-2;
				font-size: 26rpx;
			}

			.close {
				padding: 6rpx;
			}
		}

		.info {
			background: #fff;
			padding: 30rpx;
			border-radius: 30rpx 30rpx 0 0;
			overflow: hidden;


			scroll-view {
				max-height: 50vh;

				.row {
					display: flex;
					padding: 16rpx 0;
					font-size: 32rpx;
					line-height: 1.7em;

					.label {
						color: $text-font-color-3;
						width: 200rpx;
						text-align: right;
						font-size: 30rpx;
					}

					.text {
						flex: 1;
						width: 0;
					}

					.tabs {
						display: flex;
						flex-wrap: wrap;

						.tab {
							border: 1px solid $brand-theme-color;
							color: $brand-theme-color;
							font-size: 22rpx;
							padding: 10rpx 30rpx;
							border-radius: 40rpx;
							line-height: 1em;
							margin: 0 10rpx 10rpx 0;
						}
					}
				}
			}
		}

		.ratePopup {
			background: #fff;
			padding: 30rpx;
			width: 70vw;
			border-radius: 30rpx;

			.content {
				padding: 30rpx 0;
				display: flex;
				justify-content: center;
				align-items: center;

				.text {
					color: #FFCA3E;
					padding-left: 10rpx;
					width: 80rpx;
					line-height: 1em;
					text-align: right;
					font-size: 28rpx;
				}
			}

			.footer {
				padding: 10rpx 0;
				display: flex;
				align-items: center;
				justify-content: center;
			}
		}
	}
</style>